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1990年我场大面积应用国产除草剂50%乙草胺乳油防除大豆田杂草,灭草效果很好,敢与进口除草剂拉索、都尔媲美。乙草胺主要防除稗草、狗尾草等一年生禾本科杂草,对鬼针、龙葵、蓼等部分阔叶草也有一定防效。由于种种原因,在使用乙草胺时出现了不同程度的药害,对其原因和预防办法我们做了调查和试验。 1.施药时气温低用同一剂量、同一施药方法,前期施药,气温在16℃左右,药害都较重;而后期施药,气温在18～19℃时大部
In 1990, I applied a large area of domestic herbicide 50% acetochlor EC soybean weed control weeds, weed good effect, dare to import and herbicides cable, are comparable to Seoul. Acetochlor mainly to control barnyard grass, Setaria and other annual grass weeds, on the needle, solanum, Polygonum and some broadleaf also have some control effect. Due to various reasons, different levels of phytotoxicity have occurred in the use of acetochlor. We investigated and tested its causes and preventive measures. 1. spraying low temperature with the same dose, the same application method, pre-application, the temperature at about 16 ℃, the injury is heavier; and post-application, the temperature at 18 ~ 19 ℃ most